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January 24, 2013 05:18
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简单的HTTP代理服务器
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/** | |
* 简单的HTTP代理服务器 | |
* | |
* @author 老雷<leizongmin@gmail.com> | |
*/ | |
var http = require('http'); | |
// 记录日志 | |
var log = function () { | |
var now = new Date().toISOString(); | |
arguments[0] = '[' + now + '] ' + arguments[0]; | |
console.log.apply(console, arguments); | |
}; | |
// 获取请求的headers,去掉host和connection | |
var getHeader = function (req) { | |
var ret = {}; | |
for (var i in req.headers) { | |
if (!/host|connection/i.test(i)) { | |
ret[i] = req.headers[i]; | |
} | |
} | |
return ret; | |
}; | |
// 获取请求的路径 | |
var getPath = function (req) { | |
var url = req.url; | |
if (url.substr(0, 7).toLowerCase() === 'http://') { | |
var i = url.indexOf('/', 7); | |
if (i !== -1) { | |
url = url.substr(i); | |
} | |
} | |
return url; | |
}; | |
// 代理请求 | |
var counter = 0; | |
var onProxy = function (req, res) { | |
counter++; | |
var num = counter; | |
var opt = { | |
host: req.headers.host, | |
path: getPath(req), | |
method: req.method, | |
headers: getHeader(req) | |
}; | |
log('#%d\t%s http://%s%s', num, req.method, opt.host, opt.path); | |
var req2 = http.request(opt, function (res2) { | |
res.writeHead(res2.statusCode, res2.headers); | |
res2.pipe(res); | |
res2.on('end', function () { | |
log('#%d\tEND', num); | |
}); | |
}); | |
if (/POST|PUT/i.test(req.method)) { | |
req.pipe(req2); | |
} else { | |
req2.end(); | |
} | |
req2.on('error', function (err) { | |
log('#%d\tERROR: %s', num, err.stack); | |
res.end(err.stack); | |
}); | |
}; | |
// 启动http服务器 | |
var server = http.createServer(onProxy); | |
server.listen(8080); | |
log('proxy server listen on http://127.0.0.1:8080'); |
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